December weather forecast
Reading, PA

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This beautiful and colorful pagoda located up on Mt. Penn is a beautiful spot to enjoy sweeping views of the scenic Reading City below, in Pennsylvania
This beautiful and colorful pagoda located up on Mt. Penn is a beautiful spot to enjoy sweeping views of the scenic Reading City below, in Pennsylvania

Weather in December

December in Reading, Pennsylvania, is characterized by a wintery climate, shorter daylight hours, and an increasing chance of snowfall. Specifically, the snow accumulates to 1.5in on average during this month—a clear indication of winter weather. The festive air, bright holiday lights, and potential for a white Christmas make December a magical month in Reading. Residents bundle up in their warmest clothing to celebrate the holiday season and welcome the New Year. Despite the cold, the joyous atmosphere and holiday spirit make it a delightful time to be in Reading, Pennsylvania.

Temperature

December brings a decrease in the average high-temperature, falling from November's cool 50.2°F (10.1°C) to a cold 40.6°F (4.8°C). Reading experiences an average low-temperature reading of 29.7°F (-1.3°C) throughout December.

Humidity

In December, the average relative humidity is 80%.

Rainfall

In December, the rain falls for 10.4 days. Throughout December, 2.44" (62mm) of precipitation is accumulated. In Reading, during the entire year, the rain falls for 155.7 days and collects up to 30.83" (783mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Reading, during December, snow falls for 3.7 days and regularly aggregates up to 1.5" (38mm) of snow. In Reading, during the entire year, snow falls for 21.1 days and aggregates up to 12.28" (312mm) of snow.

Daylight

The month with the shortest days in Reading is December, with an average of 9h and 24min of daylight.
On the first day of December, sunrise is at 7:07 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:47 pm EST.

Sunshine

In December, the average sunshine is 4.7h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for average individuals.
Note: In December, the maximum UV index of 2 transforms into these recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
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Frequently asked questions

How cold is December in Reading?

In Reading, in December, the average high-temperature is 40.6°F (4.8°C), and the average low-temperature is 29.7°F (-1.3°C). In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 86°F (30°C).

What is the average humidity in December in Reading?

The average relative humidity in December in Reading, Pennsylvania, is 80%.

How much does it rain in Reading in December?

In Reading, in December, it is raining for 10.4 days, with typically 2.44" (62mm) of accumulated precipitation.

How much does it snow in Reading in December?

In Reading, in December, snow falls for 3.7 days, with typically accumulated 1.5" (38mm) of snow.

What is the month with the shortest days in Reading?

December has the shortest days of the year in Reading, Pennsylvania, with an average of 9h and 24min of daylight.

How many hours of daylight does Reading have in December?

In Reading, Pennsylvania, the average day length in December is 9h and 21min.

What time are sunrise and sunset in December in Reading?

In December, on the first day of the month, sunrise is at 7:07 am and sunset at 4:38 pm. On the last day of the month, in Reading, sunrise is at 7:26 am and sunset at 4:47 pm EST.

How long on average sun shines in December in Reading?

The average sunshine duration in December is 4.7h.

What is the month with the lowest UV index in Reading?

The months with the lowest UV index in Reading, Pennsylvania, are January through March, November and December, with an average maximum UV index of 2.

How high is the UV index in December in Reading?

The average daily maximum UV index in December in Reading, Pennsylvania, is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Reading, PA

Average temperature in December - Reading, PA
  • Average high temperature in December: 40.6°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (35.1°F).

  • Average low temperature in December: 29.7°F

The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).

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Average pressure in December
Reading, PA

Average pressure in December - Reading, PA
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in December
Reading, PA

Average wind speed in December - Reading, PA
  • Average wind speed in December: 7.9mph

The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in December
Reading, PA

Average humidity in December - Reading, PA
  • Average humidity in December: 80%

The months with the highest relative humidity are February and October (81%).
The month with the lowest relative humidity is April (76%).

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Average rainfall in December
Reading, PA

Average rainfall in December - Reading, PA
  • Average rainfall in December: 2.44"

The wettest month (with the highest rainfall) is August (3.54").
The driest month (with the least rainfall) is February (2.05").

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Average rainfall days in December
Reading, PA

Average rainfall days in December - Reading, PA
  • Average rainfall days in December: 10.4 days

The month with the highest number of rainy days is July (18.2 days).
The month with the least rainy days is January (7.9 days).

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Average snowfall in December
Reading, PA

Average snowfall in December - Reading, PA
  • Average snowfall in December: 1.5"

The month with the highest snowfall is March (3.58").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Reading, PA

Average snowfall days in December - Reading, PA
  • Average snowfall days in December: 3.7 days

The month with the highest number of snowfall days is January (6.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Reading, PA

Average daylight in December / Average sunshine in December - Reading, PA
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in December
Reading, PA

Average sunshine days in December - Reading, PA
  • Average sunshine days in December: 17.9 days

The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is July (10.8 days).

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Average UV index in December
Reading, PA

Average UV index in December - Reading, PA
  • Average UV index in December: 2

The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in December
Reading, PA

Average cloud cover in December - Reading, PA
  • Average cloud cover in December: 50

The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 32).

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Average visibility in December
Reading, PA

Average visibility in December - Reading, PA
  • Average visibility in December: 6mi

The months with the highest visibility are January, March, April, June, July, November and December (6mi).
The months with the lowest visibility are February, May, August, September and October (5mi).

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Reading, Pennsylvania, USA

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